INSULATION GUARD FOR NON-GROUNDED AC NETWORKS
5Pages

tasc.office_2010.pdf table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:4.00pt "Arial", sans-serif; } .font1 { font:5.00pt "Arial", sans-serif; } .font2 { font:6.00pt "Arial", sans-serif; } .font3 { font:7.00pt "Arial", sans-serif; } .font4 { font:10.00pt "Arial", sans-serif; } .font5 { font:25.00pt "Arial", sans-serif; } KCM16x Direct connection upto 750V line voltage, upto25kVwith HV adapter Օ Monitoring during both live and standby conditions For use in land, marine, offshore, sub-sea and ocean floor Installations Օ Comply with AODC 035 Code of Practice "Megger" - safeto1.4kVDCwhenauxpowerisOFF Օ Immunetoearth capacitance and voltage surges Analogue output proportional to meter reading (F-version) Օ Optional slave indicator Specifications Application General 100-120, 200-240,380415 or 440-460VAC,40-70Hz(Fuse0.5A) 9-36VDC (Fuse 2A)_ The digitally controlled KCM16x series monitors insulation level between a non-grounded (IT) AC mains and its protective earth, regardless of whether the mains is live or non-live (standby). The unit is for land, marine, offshore, sub-sea and ocean floor use. An AC or DC auxiliary voltage is required for the unit, if powered from a separate source the network can also be monitored during standby conditions. Only ONE KCM16x can be connected to each IT-system. The ohmmeter and the triple-zone status LEDs give at a glance the clear safety message: -ALARM (red zone) -WARNING (yellow zone) -HEALTHY(greenzone) General IDVMEASURING PRINCIPLE Insulation is measured between the complete galvanically interconnected AC network and its protective earth. The unit injects a sequentially coded measuring signal into the monitored system. The signal flows to ground via the path of the insulation fault, the level of flowindicates the insulation resistance. The measuring accuracy is not influenced by any normal kind of load attached to the AC network. Trip levels and delays are settable on unit rear. A trip LED flashes when the trip level is passed, the relay trips when the delay has elapsed. The timer resets if thefaultisremoved during countdown. Auxiliary Supply: Optional Voltage: AC: 100VA - 250V/2A max. DC: 50W - 100V/1A max. Contact rating: Analogue Output: F-versions Up to 20mA, max 500R Upto 10V, min100kohm (other on request)_ Temprature: -20 to +70°C Weight: 0.6kgs Front protection: IP21 INTELLIGENTSETTINGASSISTANCE KCM16x has a built-in Assistance tool for setting/verification of the trip levels and the analogue output. When either the Warning or Alarm potmeter on the front is operated by user, the slave meter goes into Assistance Mode and meter reading and analogue output will reflect the potmeter setting. How to set alarm levels: Firstly adjust potmeter fully clockwise (see that slave meter goes to the top), then adjust potmeter down to required Warning or Alarm setpoint. Without any movement of potmeters, the meter will revert to normal Insulation Monitoring Mode afterapproximately 10 seconds. MEGGERSAFE When auxiliary power is OFF the unit input is automatically protected against "megger" test voltages up to 1.4kVDC, and incorrect measurementscaused by the unit's input impedance are avoided. OUTPUTS All F versions have an isolated analogue output proportional to meter reading. If output is used for remote meter reading, we recommend 0-1 mAfor the slave indicator. SAFETY When a voltage adapter (CHx, ANx or ARx) is used the signal to terminals 4 and 6 on KCM163x and KCM165x is limitedtoasafelevel,avoidingany dangerous voltage exposureto personnel. NOTE Special versions of the KCM161,KCM163 andKCM165 areavailableas: KCM161M & KCM163M - Insulation guard with DC detection function, protected against high-energy DC voltage imposed on the monitored AC supply. KCM261x&KCM263x -Insulation guard with measuring loop continuity monitoring. Only for adaptersupto5kV. How to test analogue output signal: Adjust any trip level potmeter to activate Assistance Mode. Example: On a 4-20mA output, adjust potmeter fully anti clockwisefor4mAandfullyclockwisefor20mA. The KCM16x range is designed to comply with specification AODC035 "Code of PracticefortheSafe Useof Electricity UnderWater" issuedby IMCA. Page1 of5 REF: Datasheet.KCM16x-REV: 1.05/11.2011 Megacon reserves the right to make any changes to the information at any i

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